Cannot reconcile for invoice and cn with withholding tax

Dear all,

I got the following error when i try to perform internal reconciliation on a AR Invoice against a AR CN:

Withholding Tax needs to be processed for at least one of the selected transactions. This can be done by restricting reconciliation to transactions with the same withholding tax code

My system is on 2007B PL13

I have a AR Invoice (item type) with withholding tax (category for withholding tax -> Payment)

I have a AR CN (service type) with the same withholding tax code

I try to do internal reconciliation but the above error.

Anyone can help?

Thanks in advance.